So my reading of the rules indicates it's 2 nights per person -- you can't stay 2 nights in 1 hotel and 2 nights in another. If you're travelling with someone else, I suppose you can each make a 2 night reservation. Anyone read the terms differently?
It will be interesting to see how impossible it will be to make reservations. My guess -- very, very difficult! I also expect their system to crash that morning. But we'll see.